Improved scroll-wheel for harvesters



UNITED STATES PATENT OFFICE.

OHAS. D. ROGERS, OF UTIOA, NEW YORK.

Specification forming part of Letters Patent No. 17,749, dated July 7,1857.

To all whom it may concern:

Be it known that I, C. D.ROGERS, of Utica, in the county of Oneida, inthe State of New York, have invented a new and useful Improvement inScroll-Wheels for Harvesters; and I lo hereby declare that the followingis a full and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in the peculiar construction ofscroll-wheelsfor har vesters, as hereinafter described.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

ln the accompanying` drawings, Figure l represents a side elevation ofmy improved wheel, and Fig. 2 a vertical section of the line r 00, Fig.l.

A is the main portion or rim, constructed, as seen, with arms Ocentering in a suitable linb, B. A portion of rim A adjacent to the armsC is cast thicker than the balance, forming a pro jection internally, asseen at b, Fig. 2, which,

relatively to theplane of the arms G, has a se- .Y-ries of elevationsand depressions alternately,

or is zigzag.

D is the other portion or rim, the external diameter of which is equalto the internal diameter of the thinner portion ot' rim A, and the widthof which is such that when said rim D is placed within rim A there shallbe sufficient space left (in a cross-section of the rim) between theshoulder b and the edge d of rim D (which edge is made zigzag) toaccommodate a friction roll or stud which is operated upon bythe zigzagedges d and b of rims A and D.

It will be perceived that the rim D is in the form of a T, (see Fig. 2,)in a cross-section, or has a double flange, one portion of which, a,serves as a stop or bearing-surface against the edge of rim A, its edgecoming flush with the face of rim A. The other, c, projects inward toany desired extent to prevent the entrance of particles of earth, 85o.,while the wheel is rolling upon the ground, or when it may sink slightlybelow the surface of the same, as is often the case.

The utility of the ilange c is obvious, and its value inestimable in thescroll-wheel, one of the greatest objections to which is its liabilityto clog or foul up with particles of dirt. The dirt is prevented fromfalling in the arm side of the wheel by the existence of a web or flangebetween the arms.

By constructing the scroll-wheel, as shown and described, in twoseparate parts, the use of cores becomes unnecessary, which greatlylessens the expense of the casting, .while the chilling process may bereadily applied, by which the duration and consequently the value of thewheel is increased.

The side of iiange a which is adjacent to the edge of rim Amay bereadily faced of` true to the zigzag edge of rim D, as may also the edgeof rim A to the zigzag edge b, whereby a perfect adjustment is effected(in one direc-V tion) between the two zigzag edges, when the rim D isplaced within the rim A and the ange a brought to bear against the edgeof rim A, as seen at Fig. 2.

Having described the nature of my improvement, and its construction, Ido not wish to be understood as claiming broadly the construction ofscroll-wheels in two separate parts; but

What I do claim as my invention, and desire to secure by Letters Patent,is-

Oonstructing scroll-wheels ot' harvcsters in two separate parts whenboth the adjustable portion D and main rim A are constructed andarranged in the peculiar manner above set forth. j

In testimony whereof I have hereunto set my hand.

, CHA S. D. ROGERS. Witnesses:

W. H. CHAPMAN, JOHN T. PERKINS.

